2 Answers
2

No. The mail icon is for activity associated with a user login - things that have happened since they last visited with an authenticated machine. The API has no authentication - it's site centric, not user centric. Hence, this won't be possible until at least v2.0 (sometime next year).

Well, kinda. The API key is associated with the user who registered it, so it is feasible from a technical perspective (assuming no other dependencies like browser cookies are required), but because an API key can be shared among users, it doesn't make 100% sense from a usability perspective.
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RedFilterSep 3 '10 at 11:28